<?php
/**
 * CUrlManager class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CUrlManager manages the URLs of Yii Web applications.
 *
 * It provides URL construction ({@link createUrl()}) as well as parsing ({@link parseUrl()}) functionality.
 *
 * URLs managed via CUrlManager can be in one of the following two formats,
 * by setting {@link setUrlFormat urlFormat} property:
 * <ul>
 * <li>'path' format: /path/to/EntryScript.php/name1/value1/name2/value2...</li>
 * <li>'get' format:  /path/to/EntryScript.php?name1=value1&name2=value2...</li>
 * </ul>
 *
 * When using 'path' format, CUrlManager uses a set of {@link setRules rules} to:
 * <ul>
 * <li>parse the requested URL into a route ('ControllerID/ActionID') and GET parameters;</li>
 * <li>create URLs based on the given route and GET parameters.</li>
 * </ul>
 *
 * A rule consists of a route and a pattern. The latter is used by CUrlManager to determine
 * which rule is used for parsing/creating URLs. A pattern is meant to match the path info
 * part of a URL. It may contain named parameters using the syntax '&lt;ParamName:RegExp&gt;'.
 *
 * When parsing a URL, a matching rule will extract the named parameters from the path info
 * and put them into the $_GET variable; when creating a URL, a matching rule will extract
 * the named parameters from $_GET and put them into the path info part of the created URL.
 *
 * If a pattern ends with '/*', it means additional GET parameters may be appended to the path
 * info part of the URL; otherwise, the GET parameters can only appear in the query string part.
 *
 * To specify URL rules, set the {@link setRules rules} property as an array of rules (pattern=>route).
 * For example,
 * <pre>
 * array(
 *     'articles'=>'article/list',
 *     'article/<id:\d+>/*'=>'article/read',
 * )
 * </pre>
 * Two rules are specified in the above:
 * <ul>
 * <li>The first rule says that if the user requests the URL '/path/to/index.php/articles',
 *   it should be treated as '/path/to/index.php/article/list'; and vice versa applies
 *   when constructing such a URL.</li>
 * <li>The second rule contains a named parameter 'id' which is specified using
 *   the &lt;ParamName:RegExp&gt; syntax. It says that if the user requests the URL
 *   '/path/to/index.php/article/13', it should be treated as '/path/to/index.php/article/read?id=13';
 *   and vice versa applies when constructing such a URL.</li>
 * </ul>
 *
 * Starting from version 1.0.5, the route part may contain references to named parameters defined
 * in the pattern part. This allows a rule to be applied to different routes based on matching criteria.
 * For example,
 * <pre>
 * array(
 *      '<_c:(post|comment)>/<id:\d+>/<_a:(create|update|delete)>'=>'<_c>/<_a>',
 *      '<_c:(post|comment)>/<id:\d+>'=>'<_c>/view',
 *      '<_c:(post|comment)>s/*'=>'<_c>/list',
 * )
 * </pre>
 * In the above, we use two named parameters '<_c>' and '<_a>' in the route part. The '<_c>'
 * parameter matches either 'post' or 'comment', while the '<_a>' parameter matches an action ID.
 *
 * Like normal rules, these rules can be used for both parsing and creating URLs.
 * For example, using the rules above, the URL '/index.php/post/123/create'
 * would be parsed as the route 'post/create' with GET parameter 'id' being 123.
 * And given the route 'post/list' and GET parameter 'page' being 2, we should get a URL
 * '/index.php/posts/page/2'.
 *
 * Starting from version 1.0.11, it is also possible to include hostname into the rules
 * for parsing and creating URLs. One may extract part of the hostname to be a GET parameter.
 * For example, the URL <code>http://admin.example.com/en/profile</code> may be parsed into GET parameters
 * <code>user=admin</code> and <code>lang=en</code>. On the other hand, rules with hostname may also be used to
 * create URLs with parameterized hostnames.
 *
 * In order to use parameterized hostnames, simply declare URL rules with host info, e.g.:
 * <pre>
 * array(
 *     'http://<user:\w+>.example.com/<lang:\w+>/profile' => 'user/profile',
 * )
 * </pre>
 *
 * Starting from version 1.1.8, one can write custom URL rule classes and use them for one or several URL rules.
 * For example,
 * <pre>
 * array(
 *   // a standard rule
 *   '<action:(login|logout)>' => 'site/<action>',
 *   // a custom rule using data in DB
 *   array(
 *     'class' => 'application.components.MyUrlRule',
 *     'connectionID' => 'db',
 *   ),
 * )
 * </pre>
 * Please note that the custom URL rule class should extend from {@link CBaseUrlRule} and
 * implement the following two methods,
 * <ul>
 *    <li>{@link CBaseUrlRule::createUrl()}</li>
 *    <li>{@link CBaseUrlRule::parseUrl()}</li>
 * </ul>
 *
 * CUrlManager is a default application component that may be accessed via
 * {@link CWebApplication::getUrlManager()}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CUrlManager.php 3237 2011-05-25 13:13:26Z qiang.xue $
 * @package system.web
 * @since 1.0
 */
class CUrlManager extends CApplicationComponent
{
    const CACHE_KEY='Yii.CUrlManager.rules';
    const GET_FORMAT='get';
    const PATH_FORMAT='path';

    /**
     * @var array the URL rules (pattern=>route).
     */
    public $rules=array();
    /**
     * @var string the URL suffix used when in 'path' format.
     * For example, ".html" can be used so that the URL looks like pointing to a static HTML page. Defaults to empty.
     */
    public $urlSuffix='';
    /**
     * @var boolean whether to show entry script name in the constructed URL. Defaults to true.
     */
    public $showScriptName=true;
    /**
     * @var boolean whether to append GET parameters to the path info part. Defaults to true.
     * This property is only effective when {@link urlFormat} is 'path' and is mainly used when
     * creating URLs. When it is true, GET parameters will be appended to the path info and
     * separate from each other using slashes. If this is false, GET parameters will be in query part.
     * @since 1.0.3
     */
    public $appendParams=true;
    /**
     * @var string the GET variable name for route. Defaults to 'r'.
     */
    public $routeVar='r';
    /**
     * @var boolean whether routes are case-sensitive. Defaults to true. By setting this to false,
     * the route in the incoming request will be turned to lower case first before further processing.
     * As a result, you should follow the convention that you use lower case when specifying
     * controller mapping ({@link CWebApplication::controllerMap}) and action mapping
     * ({@link CController::actions}). Also, the directory names for organizing controllers should
     * be in lower case.
     * @since 1.0.1
     */
    public $caseSensitive=true;
    /**
     * @var boolean whether the GET parameter values should match the corresponding
     * sub-patterns in a rule before using it to create a URL. Defaults to false, meaning
     * a rule will be used for creating a URL only if its route and parameter names match the given ones.
     * If this property is set true, then the given parameter values must also match the corresponding
     * parameter sub-patterns. Note that setting this property to true will degrade performance.
     * @since 1.1.0
     */
    public $matchValue=false;
    /**
     * @var string the ID of the cache application component that is used to cache the parsed URL rules.
     * Defaults to 'cache' which refers to the primary cache application component.
     * Set this property to false if you want to disable caching URL rules.
     * @since 1.0.3
     */
    public $cacheID='cache';
    /**
     * @var boolean whether to enable strict URL parsing.
     * This property is only effective when {@link urlFormat} is 'path'.
     * If it is set true, then an incoming URL must match one of the {@link rules URL rules}.
     * Otherwise, it will be treated as an invalid request and trigger a 404 HTTP exception.
     * Defaults to false.
     * @since 1.0.6
     */
    public $useStrictParsing=false;
    /**
     * @var string the class name or path alias for the URL rule instances. Defaults to 'CUrlRule'.
     * If you change this to something else, please make sure that the new class must extend from
     * {@link CBaseUrlRule} and have the same constructor signature as {@link CUrlRule}.
     * It must also be serializable and autoloadable.
     * @since 1.1.8
     */
    public $urlRuleClass='CUrlRule';

    private $_urlFormat=self::GET_FORMAT;
    private $_rules=array();
    private $_baseUrl;


    /**
     * Initializes the application component.
     */
    public function init()
    {
        parent::init();
        $this->processRules();
    }

    /**
     * Processes the URL rules.
     */
    protected function processRules()
    {
        if(empty($this->rules) || $this->getUrlFormat()===self::GET_FORMAT)
        return;
        if($this->cacheID!==false && ($cache=Yii::app()->getComponent($this->cacheID))!==null)
        {
            $hash=md5(serialize($this->rules));
            if(($data=$cache->get(self::CACHE_KEY))!==false && isset($data[1]) && $data[1]===$hash)
            {
                $this->_rules=$data[0];
                return;
            }
        }
        foreach($this->rules as $pattern=>$route)
        $this->_rules[]=$this->createUrlRule($route,$pattern);
        if(isset($cache))
        $cache->set(self::CACHE_KEY,array($this->_rules,$hash));
    }

    /**
     * Adds new URL rules.
     * In order to make the new rules effective, this method must be called BEFORE
     * {@link CWebApplication::processRequest}.
     * @param array $rules new URL rules (pattern=>route).
     * @since 1.1.4
     */
    public function addRules($rules)
    {
        foreach($rules as $pattern=>$route)
        $this->_rules[]=$this->createUrlRule($route,$pattern);
    }

    /**
     * Creates a URL rule instance.
     * The default implementation returns a CUrlRule object.
     * @param mixed $route the route part of the rule. This could be a string or an array
     * @param string $pattern the pattern part of the rule
     * @return CUrlRule the URL rule instance
     * @since 1.1.0
     */
    protected function createUrlRule($route,$pattern)
    {
        if(is_array($route) && isset($route['class']))
        return $route;
        else
        return new $this->urlRuleClass($route,$pattern);
    }

    /**
     * Constructs a URL.
     * @param string $route the controller and the action (e.g. article/read)
     * @param array $params list of GET parameters (name=>value). Both the name and value will be URL-encoded.
     * If the name is '#', the corresponding value will be treated as an anchor
     * and will be appended at the end of the URL. This anchor feature has been available since version 1.0.1.
     * @param string $ampersand the token separating name-value pairs in the URL. Defaults to '&'.
     * @return string the constructed URL
     */
    public function createUrl($route,$params=array(),$ampersand='&')
    {
        unset($params[$this->routeVar]);
        foreach($params as &$param)
        if($param===null)
        $param='';
        if(isset($params['#']))
        {
            $anchor='#'.$params['#'];
            unset($params['#']);
        }
        else
        $anchor='';
        $route=trim($route,'/');
        foreach($this->_rules as $i=>$rule)
        {
            if(is_array($rule))
            $this->_rules[$i]=$rule=Yii::createComponent($rule);
            if(($url=$rule->createUrl($this,$route,$params,$ampersand))!==false)
            {
                if($rule->hasHostInfo)
                return $url==='' ? '/'.$anchor : $url.$anchor;
                else
                return $this->getBaseUrl().'/'.$url.$anchor;
            }
        }
        return $this->createUrlDefault($route,$params,$ampersand).$anchor;
    }

    /**
     * Creates a URL based on default settings.
     * @param string $route the controller and the action (e.g. article/read)
     * @param array $params list of GET parameters
     * @param string $ampersand the token separating name-value pairs in the URL.
     * @return string the constructed URL
     */
    protected function createUrlDefault($route,$params,$ampersand)
    {
        if($this->getUrlFormat()===self::PATH_FORMAT)
        {
            $url=rtrim($this->getBaseUrl().'/'.$route,'/');
            if($this->appendParams)
            {
                $url=rtrim($url.'/'.$this->createPathInfo($params,'/','/'),'/');
                return $route==='' ? $url : $url.$this->urlSuffix;
            }
            else
            {
                if($route!=='')
                $url.=$this->urlSuffix;
                $query=$this->createPathInfo($params,'=',$ampersand);
                return $query==='' ? $url : $url.'?'.$query;
            }
        }
        else
        {
            $url=$this->getBaseUrl();
            if(!$this->showScriptName)
            $url.='/';
            if($route!=='')
            {
                $url.='?'.$this->routeVar.'='.$route;
                if(($query=$this->createPathInfo($params,'=',$ampersand))!=='')
                $url.=$ampersand.$query;
            }
            else if(($query=$this->createPathInfo($params,'=',$ampersand))!=='')
            $url.='?'.$query;
            return $url;
        }
    }

    /**
     * Parses the user request.
     * @param CHttpRequest $request the request application component
     * @return string the route (controllerID/actionID) and perhaps GET parameters in path format.
     */
    public function parseUrl($request)
    {
        if($this->getUrlFormat()===self::PATH_FORMAT)
        {
            $rawPathInfo=$request->getPathInfo();
            $pathInfo=$this->removeUrlSuffix($rawPathInfo,$this->urlSuffix);
            foreach($this->_rules as $i=>$rule)
            {
                if(is_array($rule))
                $this->_rules[$i]=$rule=Yii::createComponent($rule);
                if(($r=$rule->parseUrl($this,$request,$pathInfo,$rawPathInfo))!==false)
                return isset($_GET[$this->routeVar]) ? $_GET[$this->routeVar] : $r;
            }
            if($this->useStrictParsing)
            throw new CHttpException(404,Yii::t('yii','Unable to resolve the request "{route}".',
            array('{route}'=>$pathInfo)));
            else
            return $pathInfo;
        }
        else if(isset($_GET[$this->routeVar]))
        return $_GET[$this->routeVar];
        else if(isset($_POST[$this->routeVar]))
        return $_POST[$this->routeVar];
        else
        return '';
    }

    /**
     * Parses a path info into URL segments and saves them to $_GET and $_REQUEST.
     * @param string $pathInfo path info
     * @since 1.0.3
     */
    public function parsePathInfo($pathInfo)
    {
        if($pathInfo==='')
        return;
        $segs=explode('/',$pathInfo.'/');
        $n=count($segs);
        for($i=0;$i<$n-1;$i+=2)
        {
            $key=$segs[$i];
            if($key==='') continue;
            $value=$segs[$i+1];
            if(($pos=strpos($key,'['))!==false && ($m=preg_match_all('/\[(.*?)\]/',$key,$matches))>0)
            {
                $name=substr($key,0,$pos);
                for($j=$m-1;$j>=0;--$j)
                {
                    if($matches[1][$j]==='')
                    $value=array($value);
                    else
                    $value=array($matches[1][$j]=>$value);
                }
                if(isset($_GET[$name]) && is_array($_GET[$name]))
                $value=CMap::mergeArray($_GET[$name],$value);
                $_REQUEST[$name]=$_GET[$name]=$value;
            }
            else
            $_REQUEST[$key]=$_GET[$key]=$value;
        }
    }

    /**
     * Creates a path info based on the given parameters.
     * @param array $params list of GET parameters
     * @param string $equal the separator between name and value
     * @param string $ampersand the separator between name-value pairs
     * @param string $key this is used internally.
     * @return string the created path info
     * @since 1.0.3
     */
    public function createPathInfo($params,$equal,$ampersand, $key=null)
    {
        $pairs = array();
        foreach($params as $k => $v)
        {
            if ($key!==null)
            $k = $key.'['.$k.']';

            if (is_array($v))
            $pairs[]=$this->createPathInfo($v,$equal,$ampersand, $k);
            else
            $pairs[]=urlencode($k).$equal.urlencode($v);
        }
        return implode($ampersand,$pairs);
    }

    /**
     * Removes the URL suffix from path info.
     * @param string $pathInfo path info part in the URL
     * @param string $urlSuffix the URL suffix to be removed
     * @return string path info with URL suffix removed.
     */
    public function removeUrlSuffix($pathInfo,$urlSuffix)
    {
        if($urlSuffix!=='' && substr($pathInfo,-strlen($urlSuffix))===$urlSuffix)
        return substr($pathInfo,0,-strlen($urlSuffix));
        else
        return $pathInfo;
    }

    /**
     * Returns the base URL of the application.
     * @return string the base URL of the application (the part after host name and before query string).
     * If {@link showScriptName} is true, it will include the script name part.
     * Otherwise, it will not, and the ending slashes are stripped off.
     */
    public function getBaseUrl()
    {
        if($this->_baseUrl!==null)
        return $this->_baseUrl;
        else
        {
            if($this->showScriptName)
            $this->_baseUrl=Yii::app()->getRequest()->getScriptUrl();
            else
            $this->_baseUrl=Yii::app()->getRequest()->getBaseUrl();
            return $this->_baseUrl;
        }
    }

    /**
     * Sets the base URL of the application (the part after host name and before query string).
     * This method is provided in case the {@link baseUrl} cannot be determined automatically.
     * The ending slashes should be stripped off. And you are also responsible to remove the script name
     * if you set {@link showScriptName} to be false.
     * @param string $value the base URL of the application
     * @since 1.1.1
     */
    public function setBaseUrl($value)
    {
        $this->_baseUrl=$value;
    }

    /**
     * Returns the URL format.
     * @return string the URL format. Defaults to 'path'. Valid values include 'path' and 'get'.
     * Please refer to the guide for more details about the difference between these two formats.
     */
    public function getUrlFormat()
    {
        return $this->_urlFormat;
    }

    /**
     * Sets the URL format.
     * @param string $value the URL format. It must be either 'path' or 'get'.
     */
    public function setUrlFormat($value)
    {
        if($value===self::PATH_FORMAT || $value===self::GET_FORMAT)
        $this->_urlFormat=$value;
        else
        throw new CException(Yii::t('yii','CUrlManager.UrlFormat must be either "path" or "get".'));
    }
}


/**
 * CBaseUrlRule is the base class for a URL rule class.
 *
 * Custom URL rule classes should extend from this class and implement two methods:
 * {@link createUrl} and {@link parseUrl}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CUrlManager.php 3237 2011-05-25 13:13:26Z qiang.xue $
 * @package system.web
 * @since 1.1.8
 */
abstract class CBaseUrlRule extends CComponent
{
    /**
     * @var boolean whether this rule will also parse the host info part. Defaults to false.
     */
    public $hasHostInfo=false;
    /**
     * Creates a URL based on this rule.
     * @param CUrlManager $manager the manager
     * @param string $route the route
     * @param array $params list of parameters (name=>value) associated with the route
     * @param string $ampersand the token separating name-value pairs in the URL.
     * @return mixed the constructed URL. False if this rule does not apply.
     */
    abstract public function createUrl($manager,$route,$params,$ampersand);
    /**
     * Parses a URL based on this rule.
     * @param CUrlManager $manager the URL manager
     * @param CHttpRequest $request the request object
     * @param string $pathInfo path info part of the URL (URL suffix is already removed based on {@link CUrlManager::urlSuffix})
     * @param string $rawPathInfo path info that contains the potential URL suffix
     * @return mixed the route that consists of the controller ID and action ID. False if this rule does not apply.
     */
    abstract public function parseUrl($manager,$request,$pathInfo,$rawPathInfo);
}

/**
 * CUrlRule represents a URL formatting/parsing rule.
 *
 * It mainly consists of two parts: route and pattern. The former classifies
 * the rule so that it only applies to specific controller-action route.
 * The latter performs the actual formatting and parsing role. The pattern
 * may have a set of named parameters.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CUrlManager.php 3237 2011-05-25 13:13:26Z qiang.xue $
 * @package system.web
 * @since 1.0
 */
class CUrlRule extends CBaseUrlRule
{
    /**
     * @var string the URL suffix used for this rule.
     * For example, ".html" can be used so that the URL looks like pointing to a static HTML page.
     * Defaults to null, meaning using the value of {@link CUrlManager::urlSuffix}.
     * @since 1.0.6
     */
    public $urlSuffix;
    /**
     * @var boolean whether the rule is case sensitive. Defaults to null, meaning
     * using the value of {@link CUrlManager::caseSensitive}.
     * @since 1.0.1
     */
    public $caseSensitive;
    /**
     * @var array the default GET parameters (name=>value) that this rule provides.
     * When this rule is used to parse the incoming request, the values declared in this property
     * will be injected into $_GET.
     * @since 1.0.8
     */
    public $defaultParams=array();
    /**
     * @var boolean whether the GET parameter values should match the corresponding
     * sub-patterns in the rule when creating a URL. Defaults to null, meaning using the value
     * of {@link CUrlManager::matchValue}. When this property is false, it means
     * a rule will be used for creating a URL if its route and parameter names match the given ones.
     * If this property is set true, then the given parameter values must also match the corresponding
     * parameter sub-patterns. Note that setting this property to true will degrade performance.
     * @since 1.1.0
     */
    public $matchValue;
    /**
     * @var string the HTTP verb (e.g. GET, POST, DELETE) that this rule should match.
     * If this rule can match multiple verbs, please separate them with commas.
     * If this property is not set, the rule can match any verb.
     * Note that this property is only used when parsing a request. It is ignored for URL creation.
     * @since 1.1.7
     */
    public $verb;
    /**
     * @var boolean whether this rule is only used for request parsing.
     * Defaults to false, meaning the rule is used for both URL parsing and creation.
     * @since 1.1.7
     */
    public $parsingOnly=false;
    /**
     * @var string the controller/action pair
     */
    public $route;
    /**
     * @var array the mapping from route param name to token name (e.g. _r1=><1>)
     * @since 1.0.5
     */
    public $references=array();
    /**
     * @var string the pattern used to match route
     * @since 1.0.5
     */
    public $routePattern;
    /**
     * @var string regular expression used to parse a URL
     */
    public $pattern;
    /**
     * @var string template used to construct a URL
     */
    public $template;
    /**
     * @var array list of parameters (name=>regular expression)
     */
    public $params=array();
    /**
     * @var boolean whether the URL allows additional parameters at the end of the path info.
     */
    public $append;
    /**
     * @var boolean whether host info should be considered for this rule
     * @since 1.0.11
     */
    public $hasHostInfo;

    /**
     * Constructor.
     * @param string $route the route of the URL (controller/action)
     * @param string $pattern the pattern for matching the URL
     */
    public function __construct($route,$pattern)
    {
        if(is_array($route))
        {
            foreach(array('urlSuffix', 'caseSensitive', 'defaultParams', 'matchValue', 'verb', 'parsingOnly') as $name)
            {
                if(isset($route[$name]))
                $this->$name=$route[$name];
            }
            if(isset($route['pattern']))
            $pattern=$route['pattern'];
            $route=$route[0];
        }
        $this->route=trim($route,'/');

        $tr2['/']=$tr['/']='\\/';

        if(strpos($route,'<')!==false && preg_match_all('/<(\w+)>/',$route,$matches2))
        {
            foreach($matches2[1] as $name)
            $this->references[$name]="<$name>";
        }

        $this->hasHostInfo=!strncasecmp($pattern,'http://',7) || !strncasecmp($pattern,'https://',8);

        if($this->verb!==null)
        $this->verb=preg_split('/[\s,]+/',strtoupper($this->verb),-1,PREG_SPLIT_NO_EMPTY);

        if(preg_match_all('/<(\w+):?(.*?)?>/',$pattern,$matches))
        {
            $tokens=array_combine($matches[1],$matches[2]);
            foreach($tokens as $name=>$value)
            {
                if($value==='')
                $value='[^\/]+';
                $tr["<$name>"]="(?P<$name>$value)";
                if(isset($this->references[$name]))
                $tr2["<$name>"]=$tr["<$name>"];
                else
                $this->params[$name]=$value;
            }
        }
        $p=rtrim($pattern,'*');
        $this->append=$p!==$pattern;
        $p=trim($p,'/');
        $this->template=preg_replace('/<(\w+):?.*?>/','<$1>',$p);
        $this->pattern='/^'.strtr($this->template,$tr).'\/';
        if($this->append)
        $this->pattern.='/u';
        else
        $this->pattern.='$/u';

        if($this->references!==array())
        $this->routePattern='/^'.strtr($this->route,$tr2).'$/u';

        if(YII_DEBUG && @preg_match($this->pattern,'test')===false)
        throw new CException(Yii::t('yii','The URL pattern "{pattern}" for route "{route}" is not a valid regular expression.',
        array('{route}'=>$route,'{pattern}'=>$pattern)));
    }

    /**
     * Creates a URL based on this rule.
     * @param CUrlManager $manager the manager
     * @param string $route the route
     * @param array $params list of parameters
     * @param string $ampersand the token separating name-value pairs in the URL.
     * @return mixed the constructed URL or false on error
     */
    public function createUrl($manager,$route,$params,$ampersand)
    {
        if($this->parsingOnly)
        return false;

        if($manager->caseSensitive && $this->caseSensitive===null || $this->caseSensitive)
        $case='';
        else
        $case='i';

        $tr=array();
        if($route!==$this->route)
        {
            if($this->routePattern!==null && preg_match($this->routePattern.$case,$route,$matches))
            {
                foreach($this->references as $key=>$name)
                $tr[$name]=$matches[$key];
            }
            else
            return false;
        }

        foreach($this->defaultParams as $key=>$value)
        {
            if(isset($params[$key]))
            {
                if($params[$key]==$value)
                unset($params[$key]);
                else
                return false;
            }
        }

        foreach($this->params as $key=>$value)
        if(!isset($params[$key]))
        return false;

        if($manager->matchValue && $this->matchValue===null || $this->matchValue)
        {
            foreach($this->params as $key=>$value)
            {
                if(!preg_match('/'.$value.'/'.$case,$params[$key]))
                return false;
            }
        }

        foreach($this->params as $key=>$value)
        {
            $tr["<$key>"]=urlencode($params[$key]);
            unset($params[$key]);
        }

        $suffix=$this->urlSuffix===null ? $manager->urlSuffix : $this->urlSuffix;

        $url=strtr($this->template,$tr);

        if($this->hasHostInfo)
        {
            $hostInfo=Yii::app()->getRequest()->getHostInfo();
            if(stripos($url,$hostInfo)===0)
            $url=substr($url,strlen($hostInfo));
        }

        if(empty($params))
        return $url!=='' ? $url.$suffix : $url;

        if($this->append)
        $url.='/'.$manager->createPathInfo($params,'/','/').$suffix;
        else
        {
            if($url!=='')
            $url.=$suffix;
            $url.='?'.$manager->createPathInfo($params,'=',$ampersand);
        }

        return $url;
    }

    /**
     * Parses a URL based on this rule.
     * @param CUrlManager $manager the URL manager
     * @param CHttpRequest $request the request object
     * @param string $pathInfo path info part of the URL
     * @param string $rawPathInfo path info that contains the potential URL suffix
     * @return mixed the route that consists of the controller ID and action ID or false on error
     */
    public function parseUrl($manager,$request,$pathInfo,$rawPathInfo)
    {
        if($this->verb!==null && !in_array($request->getRequestType(), $this->verb, true))
        return false;

        if($manager->caseSensitive && $this->caseSensitive===null || $this->caseSensitive)
        $case='';
        else
        $case='i';

        if($this->urlSuffix!==null)
        $pathInfo=$manager->removeUrlSuffix($rawPathInfo,$this->urlSuffix);

        // URL suffix required, but not found in the requested URL
        if($manager->useStrictParsing && $pathInfo===$rawPathInfo)
        {
            $urlSuffix=$this->urlSuffix===null ? $manager->urlSuffix : $this->urlSuffix;
            if($urlSuffix!='' && $urlSuffix!=='/')
            return false;
        }

        if($this->hasHostInfo)
        $pathInfo=strtolower($request->getHostInfo()).rtrim('/'.$pathInfo,'/');

        $pathInfo.='/';

        if(preg_match($this->pattern.$case,$pathInfo,$matches))
        {
            foreach($this->defaultParams as $name=>$value)
            {
                if(!isset($_GET[$name]))
                $_REQUEST[$name]=$_GET[$name]=$value;
            }
            $tr=array();
            foreach($matches as $key=>$value)
            {
                if(isset($this->references[$key]))
                $tr[$this->references[$key]]=$value;
                else if(isset($this->params[$key]))
                $_REQUEST[$key]=$_GET[$key]=$value;
            }
            if($pathInfo!==$matches[0]) // there're additional GET params
            $manager->parsePathInfo(ltrim(substr($pathInfo,strlen($matches[0])),'/'));
            if($this->routePattern!==null)
            return strtr($this->route,$tr);
            else
            return $this->route;
        }
        else
        return false;
    }
}
